Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161036AbbKSPt5 (ORCPT ); Thu, 19 Nov 2015 10:49:57 -0500 Received: from mx1.redhat.com ([209.132.183.28]:52958 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934412AbbKSPtz (ORCPT ); Thu, 19 Nov 2015 10:49:55 -0500 Subject: Re: [Intel-gfx] [Announcement] 2015-Q3 release of XenGT - a Mediated Graphics Passthrough Solution from Intel To: Stefano Stabellini , Jike Song References: <53D215D3.50608@intel.com> <547FCAAD.2060406@intel.com> <54AF967B.3060503@intel.com> <5527CEC4.9080700@intel.com> <559B3E38.1080707@intel.com> <562F4311.9@intel.com> <1447870341.4697.92.camel@redhat.com> <564D78D0.80904@intel.com> Cc: Alex Williamson , "Tian, Kevin" , "xen-devel@lists.xen.org" , "igvt-g@ml01.01.org" , "intel-gfx@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" , "White, Michael L" , "Dong, Eddie" , "Li, Susie" , "Cowperthwaite, David J" , "Reddy, Raghuveer" , "Zhu, Libo" , "Zhou, Chao" , "Wang, Hongbo" , "Lv, Zhiyuan" , qemu-devel , Gerd Hoffmann From: Paolo Bonzini Message-ID: <564DEF9A.3010901@redhat.com> Date: Thu, 19 Nov 2015 16:49:46 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 772 Lines: 22 On 19/11/2015 16:32, Stefano Stabellini wrote: > > In addition to Kevin's replies, I have a high-level question: can VFIO > > be used by QEMU for both KVM and Xen? > > No. VFIO cannot be used with Xen today. When running on Xen, the IOMMU > is owned by Xen. I don't think QEMU command line compatibility between KVM and Xen should be a design goal for GVT-g. Nevertheless, it shouldn't be a problem to use a "virtual" VFIO (which doesn't need the IOMMU, because it uses the MMU in the physical GPU) even under Xen. Paolo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/